Acetylene lamp



Feb. 2 1926.

R. A. MULL ACETYLENE LAMP Filed March 15, 1922 Patented Feb. 2,1926.

UNITED STATES PATENT OFFICE.

RAYMOND A. MULL, OF BENTON HARBOR, MICHIGAN, ASSIGNOR TO THE COOLAMPCOMPANY, OF BENTON HARBOR, MICHIGAN, A CORPORATION OF MICHIGAN.

ACETYLENE LAMP.

Application filed March 15, 1922. Serial No. 3,883.

To all whom t may concern.'

Be it lnown that I, RAYMOND A. MULL, a citizen of the United States, anda resident of Benton Harbor, Berrien Countyi Michigan, have invented a.certain new and useful In'iprovement in Acetylenc Lamps, of which thefollowing is a specification.

This invention relates to acetylene lamps of that hind in which a waterchamber is provided with means for gradually feeding the water therefromto the chamber containing the carbide, whereby the acetylene gasy isgenerated in the usual and well known manner, and is then fed to aburner tip or any suitable character. More speci tically considered, theinvention relates to that particular kind of lamp in which theconstruction is such that the device may be conveniently carried on thebelt, or on the cap or in the hand of a miner, or by any other persondesiring a strong and powerful light of this character.

Generally stated, therefore, the object of the invention is to provide anovel and imi proved construction whereby an acetylene lamp is providedwhich will be reliable in its operation, convenient to open and close,when it is desired to replenish the water or the carbide, and which maybe conveniently carried without discomfort from the heat generated whilethe lamp is in operation.

It is also an object to provide certain details and features ofconstruction and combinations tending to increase the general eiiiciencyand the desirability of an acetylene lamp of this particularconstruction.

To this and other useful ends the invention consists in mattershereinafter set forth and claimed and shown in the accompanying drawingsin which- Figure 1 is a vertical section of an acetylene lamp embodyingthe principles of the invention, showing the water valve closed.

Figure 2 is a horizontal section on line 2-2 in Figure 1. Figure 3 is arear elevation of said lamp.

Figure 4i is a detail sectional view of the means for feeding waterfrom. the upper chamber to the lower chamber, showing the water valveopen.

Figure 5 is an enlarged section on line 5 5 in Figure 4.

As thus illustrated, the invention comprises an upper water chamber 1and a lower carbide chamber 2 screw connected together at 3', wherebythey can be separated to refill the carbide chamber. The upper' waterchamber has a cap et to permit filling thereof. A tube 5 extendsdownwardly from the water chamber to the carbide chamber, and isgradually tapered downward internally thereof. An adjustable controller6 extends downwardly in Said tube, being tapered at 7 to correspond withthe internal taper of the tube. The upper end of said controller has a.handle 8 for the rotation thereof, and has a screw connection 9 with thetop of the water chamber, whereby rotation of this controller will moveit up and down to control the feed of the water downward to the carbide.A collar 10 is slidable up and down on the tube 5 and is connected by arigid arm 11 with the lower end of the member 6, whereby rotation ofthis member causes it to move up and down and thereby move the collar 10up and down to clean the outer surface of said tube. The acetylene gasgenerated in the carbide chamber passes upward through the hlter 12 tothe tube 13 which leads to the burner tip 14 disposed on the side of thewater chamber and provided with a reflector 15 of any suitable characterto throw the light in the desired direction. A back plate 16, ofnon-heat conducting material, is hinged at 17 at, its upper end to theback of the water chamber 1, and is provided with curved. springs 18which form a yielding yoke to' receive the carbide chamber, and to gripthe latter, thereby holding the plate 16 in upright po sition. A hook19, or any suitable means, is attached to the back of the plate 16 bywhich to carry the lamp, either in thehand or on the belt or cap of theuser. In` this way,'and by the shield formed by the plate 16, the useris protected against discomfort from the heat generated by the lamp. Itwill be seen that the lower portion of the plate 16, as shown in Figure3, is much wider than its upper end as the heatis generated in thecarbide chamber which is held by the springs 18 in the manner shown.When it is desired to replenish the carbide, the plate 16 is swung backinto the position shown in dotted lines in Figure 1, thereby releasingthe carbide chamber, and permitting the latter to be unscrewed from thebottom of the water chamber, in a manner that will be readilyunderstood. The control of the feeding mea-ns for feeding the raterdownward from the water chamber to the. carbide chamber is effectivelyaccomplished by the rotation of the member 6, the spaceV between thetapered portion 7 and the interior of the tube 5 being uniformly variedby the up and down movement of said member, so that the water will feedmore rapidly or more slowly, depending upon requirements. l

It will be seen that the tapered valve 7 is very much greater in lengththan its maximum diameter, so that it has one very gradual orl slighttaper downward. rEhe internal taper of the tube 5 is at the same angleas the taper of the member 7, so that the opposing surfaces of the valvemember and its valve seat are always parallel, as shown in Figures l andet, up or down endwise adjustment of said member varying the distancebetween the two opposing tapered surfaces. At the same time, however,the distance at one point between the two surfaces lis always the sameas the distance at'vother points between the two surfaces, for lanyparticular adjustment of the valve mechanism thus provided. The tube 5is tapered internally for its full length, and when the valve is closedthe entire interior of :the tube is in engagement with the taperedexterior of the valve 7.

t will be seen therefore, that the devices l0 and ll form a stop tolimit the upward movement of the valve member 6, and prevents withdrawalof this member or removal thereof from the lamp.

y What I claim as my invention s l.` In an acetylene lamp thecombination of a water chamber, a carbide chamber, a feed tube extendingdownward from the water chamber and into the carbide chamber, carried bythe bottom wall of the water chamber, in position to permit water toenter theupper endof the tube which bottom wall, forms a removable capfor the top of the carbide chamber, a downwardly tapered valve memberextending through said tube, means forming a screw adjustment forcausing endwise movement of said member, comprising screw threads on theupper portion of said member, said member extending 4a distance belowsaid tube, a stop on the lower endof said member to limit'the upwardmovement thereof, said tube being tapered for its full length internallythereof vat the same angle as said member, forming a valve Vseat forsaid member, whereby endwise adjustment of said member will vary thedistance between the surface of said member and the surface of saidtube, with one surface parallel with the other.

2. A structure as specified inl claim 1, said member extendingbelowthelower end of said tube.

A structure as specified in claim 1, in combination with means carriedby the lower end of said member and movable up and down therewith toclean the outer cylindrical surface of said tube.

e. In an acetylene lamp, the combination of a water chamber, a carbidechamber, a feed tube extending downward from the water chamber to thecarbide chamber, and endwise adjustable and downwardly tapered valvemember in said tube, and means mornted on vsaid member and movable upand down therewith on said tube when the valve is operated thereby toclean the outer cylindrical surface of said tube, serving to limit theupward movement of said member. 5. A structure vas specified in claim 4,said member having a rotary screw adjustment therefore to cause saidendwise movement thereof, and said cleaning means comprising a collarslidable up and down on said tube by the adjustment of said member.

6. fn an acetylene lamp, the combination of an upper rater, chamber, alower carbide chamber', a separable connection between the two chambers,means for feeding water downward' from the upper chamber -to the lowerchamber, a shield to protect the wearer against the heat generated bythe lamp, forming a back plate therefor, means to hinge the upper end ofsaid shield to the water chamber, means tor detachably connect the lowerportion of said shield to the carbide chamber, whereby the shield willbe rigid with the lamp body, but so that the shield may be detached fromthe carbide chamber to permit one chamber to be disconnected from theother, and means on the bach of said shield to carry the lamp.

7. A structure as specified in claim 6, said means for detachablyconnecting the shield to the carbide chamber comprising springs forembracing said chamber, forming. a yielding yoke to receive and grip thechamber.

8. A structure as specified in claim 7, said shield being a fiat plateof non-heat conducting material.

RAYMOND A. MULL;

